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Methods for stereo calibration of dual-camera

一种双摄像机、摄像机的技术，应用在立体系统、图像分析、图像增强等方向，能够解决处理困难、无法符合工业需求、摄像机计算要求高等问题

Active Publication Date: 2022-01-04
COREPHOTONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution does not meet industrial needs because running these processes is very difficult and computationally demanding for the camera installed in a mobile car

Method used

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  • Methods for stereo calibration of dual-camera
  • Methods for stereo calibration of dual-camera
  • Methods for stereo calibration of dual-camera

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Embodiment Construction

[0062] Embodiments disclosed herein describe a method of dynamic stereo calibration of the intrinsic parameters and the extrinsic parameters, including the estimation of the "additional" parameters of Equation 1', the scaling factor s and the disparity error e. While all of the parameters in the equation can be estimated in a factory (where the dual camera is assembled and / or the vehicle is assembled), the parameters may change during the life of the camera due to a number of factors, including ( But not limited to) offset between sub-cameras, inclination between sub-cameras, offset between lenses and sensors of sub-cameras, change of focal length of cameras, etc.

[0063] The present application effectively calibrates the camera parameters to ensure that the camera sees its surroundings correctly and can efficiently calculate distances.

[0064] Figure 2A A flowchart describing an embodiment of an exemplary method for calibrating intrinsic and extrinsic parameters of a ster...

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Abstract

Methods for stereo calibration of a dual-camera that includes a first camera and a second camera and system for performing such methods. In some embodiments, a method comprises obtaining optimized extrinsic and intrinsic parameters using initial intrinsic parameters and, optionally, initial extrinsic parameters of the cameras, estimating an infinity offset e using the optimized extrinsic and extrinsic parameters, and estimating a scaling factor s using the optimized extrinsic and extrinsic parameters and infinity offset parameter e, wherein the optimized extrinsic and extrinsic parameters, infinity offset e and scaling factor s are used together to provide stereo calibration that leads to improved depth estimation.

Description

[0001] related application [0002] This application is a divisional application with the application number 202080002266.3 (PCT / IB2020 / 051948), the filing date of March 6, 2020, and the title of the invention "Method and System for Dynamic Stereo Calibration". This application claims priority to U.S. Provisional Patent Application No. 62 / 816,097, filed March 9, 2019, the contents of which are hereby incorporated by reference in their entirety. technical field [0003] Embodiments disclosed herein generally relate to optical instrument calibration, for example, in a stereo digital camera, and in particular to stereo calibration in a dual aperture digital camera ("dual camera") configured to be combined In vehicles as part of a driver assistance system. Background technique [0004] definition: [0005] "Dynamic Stereo Calibration" - Estimation of the "Stereo Parameters" of a stereo (dual) camera without a known calibration table, using the stereo camera (moving or not). ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/246H04N13/239
CPCH04N13/246H04N13/239G06T7/85G06T2207/10012G06T2207/30252G06T2207/30248H04N23/45G06T7/593
Inventor 纳达夫·吉瓦帕斯·伊兰奥德·吉古辛斯基以法莲·戈登堡加尔·沙伯泰
Owner COREPHOTONICS